On Wednesday SunPower said it will sell its Antelope Valley solar projects in Southern California to MidAmerican Renewables, owned by Buffett's Berkshire Hathaway Inc. Berkshire's MidAmerican Energy set up its renewable power subsidiary a year ago and has bought wind, geothermal, solar and hydro plants capable of generating 1,830 megawatts of power.

SunPower said the deal would bring in nearly as much revenue as it expected to produce from power in all of 2012.